A Discovery of Witches by Deborah Harkness. If you like Twilight you might like this. A witch is being hunted by vampires, daemons, humans, and her own kind because of a missing book. This book takes you into the hunt and the love affair between a witch and vampire. The story draws you in and before you know it, the book is finished.
When a motherless American girl living in Europe finds a medieval book and a package of letters, all addressed ominously to "My dear and unfortunate successor..." she begins to unravel a thread that leads back to her father's past, his mentor's career, and an evil hidden in the depths of history--Dracula.